Cylinder mill



- Jan. .15 1924.

A. BUHLER CYLINDER 'MILL Filed July 25'. 1922 Inf '5'] afar PatentedJan. 15, 1924.

ADOLF Bl 'HLER, F SONNE'NHUGIEL, UZWIL, SWITZERLAND, ASSIGNOR TO THEFIRM GEBminnn Bt'IHLER, or UZWIL, SWITZERLAND.

CYLINDER MILL.

Application filed July 25,

T0 allwlzom it may concern:

Be it known that I, ADoLr BtiHLEn, citizenof the Republic ofSwitzerland, residing at Sonnenhugel, Uzwil, Switzerland, have inventedcertain new. and useful Improvements in Cylinder Mills, of which thefollowing is a specification reference-I beinghad therein to theaccompanying drawing:

The present inventionrelates to improvements in cylinder mills andparticularlyto a device for eflecting an automatic lubrication withcylinder mills utilized in the chocolate industry and the like.

With cylinder mills such as for instance are utilized for grinding theraw products utilized in the chocolate industry, it is of course ofgreat importance to take precautions with regard to obtaining utmostclean-- liness in the working.

This end is attained by the cylinder mill of the present invention,according to which the two lateral shields of the mill form at the sametime the walls of lateral compartments or boxes serving also as areservoir containing the lubricant which boxes enclose the part of theautomatic lubricatino' device appertaining to the respective side aswell as the whole of the driving gear, the bearings and the mechanismfor ad'usting the center distance of the rolls.

n this way the lubricating device, the lubricant and the parts to belubricated are arranged within the two lateral compartments whereby anenhanced cleanliness of the working is ensured.

A constructional example of a cylinder mill according to the presentinvention is illustrated on the accompanying drawing. The figures of thedrawings show some parts in a diagrammatic manner, generally those partsnecessary for the explanation of the invention alone being illustrated.In the drawing:

Figs. 1 and 2 show the two lateral ends of the cylinder mill some partsbeing shown in section and the cover for the lateral compartments beingremoved;

Fig. 3 is a front view of the cylinder mill with arts shown in section.

The cylinder mill illustrated and adapted to treat the raw product formaking chocolate comprises five rolls 1, 2, 3, 1, 5 cooperating inpairs. The product to be ground is supplied by means of a hopper 6 1922.Serial No. 577,414.

to the uppermost pair f 11 frdin.

saunaswhere it passes in between-the pair of rolls 2, 3, and 3, 4 and4c, 5. 7 denotes the pulley 1 by means of which the roll 5 is rotated.

Through the interposition of the, gear wheels 8, 9 the roll 1 isactuated, thegea'r wheels 10, 11 rotate the roll-3', the j gear .wheels12, 13 rotate the roll 2 and the gear v wheels 11, 14 impart'rotation tothe"rol l' 1.-

The rolls 2, 1, 5 may be ad-j'usted in their distance relativelytome-adjacent rolls in order to alter the quantity passing between therolls, to this end the axle pins of the rolls are each mounted in aswingably arranged member 15. The members 15 may be swung around theirfulcrum pins 27 by means of screw spindles 28 and hand wheels 16, anactuation of the hand wheels 16 causes the center distance betweencooperating rolls to be varied.

The two side shields of the cylinder mill frame form at the same timepart of the walls of the two lateral compartments .or boxes 17, 18, theinterior of which is made accessible by unscrewing the detachable covers17 or 18 respectively. The lower parts of the compartments 17, 18forming reservoirs for the lubricant for instance oil, are connected toeach other by a pipe 19 so that these reservoirs communicate with eachother. Inside the compartment 17 the oil for lubrication purposes isdrawn by"- a pump 20 driven from the pulley 7 by means of gear wheels29, the oil delivered by the pump is supplied to the single bearings ofthe axles of the rolls on one side of the cylinder-mill by means of thepipes 21, 25 and 26. The superfluous oil and the waste oil drops intothe reservoir portion of the respective compartment where it mixes withthe oil stored in the reservoir. To the bearings of the axles oftherolls on the other side of the cylinder mill the oil is supplied fromthe same pump 20 through a pipe 23 leading across the cylinder-mill andfrom there to similar distributing pipes 25 and 26. The distributingpipes are sufiiciently flexible to allow an operation of the mill ofthis type may also be used for grinding other products than those usedin the chocolate industry. The utilization of the side shields as wallsfor the lateral compartments together with the disclosed arrangements ofthe automatic lubrication admits of a considerable saving in space inthe axial direction of the rolls, i. e., of a compact design of thecylinder mill.

I claim: v

1. In lubricating mechanism for cylinder mills, the combination with twohollow frame members between which the cylinders are mounted and inwhich the driving gears at the ends of said cylinders are arranged; of aremovable cover for each frame member, oiling devices for the bearingsin the respective members, a pipe extending across the mill between theframe members and a pump within one of said frame members and directlysupplying oil to the oiling device therein and also supplying oilthrough said pipe to the oiling device in the other frame member.

2. In a lubricating mechanism for cylinthe pump and the respectiveoiling devices;

and a liquid level equalizer extending'from the bottom of one framemember to the other and connecting the oil chambers. formed in thebottoms of said members,

said pumps bein'g supplied with oil from oil chamber in the member inwhich the pump is arranged. v

In testimony whereof I have affixed my signature.

ADOLF BUHLER.

